地铁车站火灾情况下“吸穿效应”对机械排烟效率的影响分析
篮杰
Analysis of Plug-holing Influence on Mechanical Smoke Extraction Efficiency under Metro Station Fire
LAN Jie
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作者信息:中铁第四勘察设计院集团有限公司，430063，武汉
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Affiliation:China Railway Siyuan Survey and Design Group Co., Ltd., 430063, Wuhan, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2019.04.009
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中图分类号/CLCN:U231.96
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栏目/Col:研究报告
摘要:
通过理论分析，找出了影响地铁车站机械排烟效率的关键因素——吸穿效应。采用FDS软件模拟分析了下排烟口、侧排烟口工况中不同挡烟垂壁底标高时，排烟口处CO平均体积分数随排烟口下方烟气层厚度变化的情况。对比分析了排烟口下方的烟气层厚度变化时排烟系统的排烟效率变化情况。找出了最佳的排烟管底标高及站厅层公共区挡烟垂壁底标高。
Abstracts:
Through theoretical analysis, the plug-holing is detected as the key factor to influence the efficiency of mechanical smoke extraction of metro station. The simulation software FDS is used to imitate and analyze the average CO concentration in smoke outlet following the changes of the flue gas thickness below the smoke outlet, when the bottom elevations of the hang wall are different under the working conditions of lower smoke vent and lateral smoke vent. The changes of smoke extraction efficiency is comparatively analyzed when the thickness of flue gas below the smoke outlet is different. Finally, the optimal bottom elevation of smoke tube and the bottom elevation of the hang wall in the public areas of metro station are found out.
引文 / Ref:
篮杰.地铁车站火灾情况下“吸穿效应”对机械排烟效率的影响分析[J].城市轨道交通研究，2019，22（4）：35.
LAN Jie.Analysis of Plug-holing Influence on Mechanical Smoke Extraction Efficiency under Metro Station Fire[J].Urban mass transit，2019，22（4）：35.
LAN Jie.Analysis of Plug-holing Influence on Mechanical Smoke Extraction Efficiency under Metro Station Fire[J].Urban mass transit，2019，22（4）：35.
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